Multimedia/Volume Keys Not Working

[Harvey Kelly <harvey1506@gmail.com>]

Hi everyone,

Running Wheezy and the multimedia/volume keys don't work in
Windowmaker (they work fine with Gnome and Xfce4), nor from the
console.

Using xev, it seems they've been mapped correctly (from an Arch wiki
page I ran this command):

xev | grep -A2 --line-buffered '^KeyRelease' | sed -n '/keycode
/s/^.*keycode \([0-9]*\).* (.*, \(.*\)).*$/\1 \2/p'

Which gave me the output:

123 XF86AudioRaiseVolume
122 XF86AudioLowerVolume
121 XF86AudioMute

The Debian wiki (http://wiki.debian.org/Keyboard/MultimediaKeys)
suggests mapping them with xmodmap - but that seems a little
redundant/wrong if xev is telling me they're already mapped (same with
xloadkeys).

I've tried installing/purging everything to do with Gnome (to get rid
of specifically pulseaudio), but that doesn't make any difference - l
even uninstalled ALSA and reinstalled with no joy.

Other function keys like brightness/dimming work fine, it's just the
volume up/down/mute that aren't working.

The card (according to alsamixer is a HDA Intel / Intel Cantiga HDMI).
Any help would be really appreciated.

Harvey